Question

The equivalent conductance of $NaCl$ at concentration $C$ and at infinite dilution are ${\lambda }_c$ and ${\lambda }_{\alpha }$ respectively. The correct relationship between ${\lambda }_c$ and ${\lambda }_{\infty }$ is given by:(Where the constant $B$ is positive)

• A. ${\lambda }_c={\lambda }_{\infty }-B\sqrt{C}$
• B. ${\lambda }_c={\lambda }_{\infty }+B\sqrt{C}$
• C. ${\lambda }_c={\lambda }_{\infty }+BC$
• D. ${\lambda }_c={\lambda }_{\infty }-BC$

Answer 1

The correct option is A ${\lambda }_c={\lambda }_{\infty }-B\sqrt{C}$

The Debye Huckle equation provides a starting point for modern treatments of non-ideality of electrolyte solutions. Non ideality arises because ions of opposite charge attract each other due to electrostatic forces. This theory calculated the activity coefficients of single ions for the dilute solutions.